I'm sure in the long run the best browser on the XO will be a native, open source one (probably using WebKit), but at the moment, if you want tabs, and, if you're like me, you need tabs, then you need to get Opera running. The install is a little kludgy (by XO standards) and if you've upgraded to a recent development build (as I have, natch), you might have to launch from a terminal (
opera) instead of the launcher.
Note that the OLPC Wiki instructions are better than the OLPC News Forum instructions, because the forum instructions have you use the tarball instead of the .rpm package, and you should always use the .rpm if you have the option because it makes it much easier to reliably update or uninstall. Also, the forum tells you to install the activity in
/usr/share/activities, instead of the more proper
The big fly in the Opera ointment is that it doesn't handle GMail's layout. Also, it is not keeping up with my typing in this Blogger textbox, so I don't know what is up with that.